Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Quality Attributes of Carrot Pieces for Baby Foods Prepared under Different Freeze Drying Conditions

냉동 건조 조건에 따른 이유식용 당근의 품질 특성

  • Kim, Hye-Kyoung (Department of Food and Nutritional Sciences, Ewha Womans University) ;
  • Suh, Dong-Soon (Department of Food and Nutritional Sciences, Ewha Womans University) ;
  • Lee, Young-Chun (Department of Food Science and Technology, Chung-Ang University) ;
  • Kim, Kwang-Ok (Department of Food and Nutritional Sciences, Ewha Womans University)
  • 김혜경 (이화여자대학교 식품영양학과) ;
  • 서동순 (이화여자대학교 식품영양학과) ;
  • 이영춘 (중앙대학교 식품공학과) ;
  • 김광옥 (이화여자대학교 식품영양학과)
  • Published : 2002.10.01
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Abstract

Optimum conditions of freeze-dried carrots were determined using response surface methodology. Physicochemical and sensory properties of freeze-dried carrot prepared at different plate temperatures and chamber pressures were evaluated. Drying time increased with decreasing plate temperature and chamber pressure. Rehydration ratio decreased inversely with chamber pressure at low plate temperature, but increased proportionally with chamber pressure at high temperature. Density, color, and sensory off-flavor were not affected by the plate temperature and chamber pressure. Sensory color, tenderness, and carrot flavor increased with decreasing plate temperature, but were not affected by chamber pressure. Based on the drying time, rehydration ratio, and sensory attributes, optimum plate temperature and chamber pressure for the preparation of freeze-dried carrot were determined as $43^{\circ}C$ and 700 micronHg, respectively.

본 연구에서는 생후 9-12개월 된 영아에게 재 수화시킨 후 숟가락으로 떠서 먹일 수 있는 비교적 입자가 큰 알갱이 형태의 이유식용 냉동건조 당근의 최적 건조조건을 결정하였다. 이를 위하여 가열판 온도와 압력을 달리하면서 당근을 냉동 건조시킨 후, 냉동건조시간과 물리적 특성 및 관능적 특성을 측정하였다. 냉동건조시간은 가열판 온도가 높고 압력이 높을수록 감소하였다. 관능적 특성 중 당근의 색, 연한 정도 및 당근의 향미는 가열판 온도가 감소함에 따라 증가하였다. 또한 압력은 냉동 건조 당근의 관능적 특성에 큰 영향을 주지 않았다. 이유식용 냉동 건조 당근의 제조 시 바람직한 특성을 가능한 한 최대로 하면서 건조시간은 가능한 한 최소로 할 수 있는 최적조건은 가열판 온도는 $43^{\circ}C$, 압력은 700 micronHg로 결정되었다.

Keywords

References

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